Thanks for the explanation.
I have read your excellent paper on the Norwood assembly line procedures, several times, and it contains a wealth of information.
I wish there was a paper on the procedures, from the conception of a revision, to Engineering Graphics, to the implementation of the revision on the line.
Your latest information has put quite a few of the pieces together for me.
There's no solid relationship between the AIM date and the implementation of a change on the line.So, where revisions always done before the implementation of a line change, or could there possibly have been a line change and then the revision?
John has posted more info on it in the past, but the events can be months apart.
I want to thank you and all the members who try to answer my questions.
The date in the revision block only indicates when Engineering Graphics released the revised sheet; the actual implementation date on the line was handled through the NPC (Notice of Production Change) system. Those were internal documents, and seldom saw the light of day. Generally speaking, implementation occurred after the revised sheet was released, but some changes occurred prior to the revisiion date; you'd need the signed-off NPC (which had the VIN of the first car with the change implemented) to know for sure.